Door mechanism for ore-pockets or similar receptacles.



R. B. PEARSON.

DOOR MECHANISM FOR ORE POOKBTS 0B. SI MILAB. BBOBPTAOLES.

' APPLICATION FILED APR. 14, 1911.

1,040,237. Patented Oct. 1, 1912.

2 BHEETS-BHEET 1.

| I I I I a 1 wmvsssss: mvsuron .Q MMJ MBQNW R. B. PEARSON. DOORMECHANISM FOR ORB POOKETS 0R SIMILAR BEGEPTAOLES.

rum-r1011 nLnn APR. 14. 1911.

1,040,237.. Patented Oct. 1, 1912.

' 2 SHEETS-SHEET 2.

WITNESSES: INVENI'OR PATENT OFFICE.

ROBERT B. PEARSON, 0F DULUTH, MINNESOTA.

DOOR MECHANISM FOR .ORE-POCKETS OR SIMILA B RECEPTACLES.

Specification of Letters Patent.

Application filed April 14, 1911. Serial K0 6213136.

Twill whom it may concern;

Be it known that I, ROBERT B. PEARSON, a

citizen of the United States, and a resident of Duluth, in the county ofSt. Louis and State of Minnesota, have invented certain new and usefulImprovements in Door Mechanisms for Ore-Pockets or Similar Receptacles,of which the following is a specification..

This invention relates more particularly to that class of ore pockets,bins or similar receptacles adapted to store one or more carloads of oreor other granular material The principal objedt, therefore, of thisinvention is to provide a mechanism whereby a larger and wider door thanheretofore nomically, thus insuring a more re. id deliability to chokingand arching because to the operation thereof. In the accompanyingdrawings Figure 1 is a front elevation of a portion of an ore pocket,having a door and door mechanism Patented Oct 1, 1912.

used, can be handled and controlled coo- B livery of material withgreatly essenfi the larger discharge opening, thus eliminatingconsiderable delay and expense incident 155' below-by manual laborbefore the remainembodying my invention, While Fig. 2 is a verticalsectional elevation taken on the line w-w of Fig. 1,-looking in thedirection of the arrows; Fig. 2 an enlarged plan sectional detail takenon line y-y of Fig. 2. Figs. 3 and t are diagrammatic views illustratingthe operation of the door. v

Referring to the drawings, 1 is the ore pocket having a bottom portion 2inclined toward the discharge opening 5 in the front wall 3. This frontwall 3 is reinforcedby the posts 4, one on each side of the outlet 5,towhich posts the side plates 6 of the opening 5 are fastened. ThlSopening 5 is closed by a door 7, said door being supported in placebynovel semi-automatic mechanism which forms the basis of this inventionand Ewill herein be described in detail.

Referring again to the drawings, the door *7 preferably of comparativelylarge size to facilitate the unloading of the pocket, is provided at theupper portion of its lateral edges with gudgeons 8, sliding in grooves 9in the vertical posts 4. The respective lower lateral edges of the doorare attached pivotally by means of thelugs 10 to simple link motions,each of which consists of struts 11 and links 12 pivoted together attheir outer ends and having their opposite or inner ends pivotedrespectively to the door 7 and side plates 6 substantiall as shown, thebearin on the pocket ing preferably somew at below that on the door andoutwardly therefrom, the struts and links being free to revolve'abouttheir pivots through part of a circle in a vertical plane at right 1angles or approximately. so to the door 7 or front .wall 3 ofthe poc et.4

The object in placin the fixed pivot of ,the link'motion'below t elevelof the door pivot at its lowest or closed position is to so 11proportion the several parts of the-linkmotion as to give the outenendsof thestruts at a time; and having a discharge opening wherefrom it isdesired to deliver the material very rapidly and still be able to cutoff the delivery thereof at will of the operator, and has particularreference to the construction and arrangement of the door; mech- 20anism by means of which this object may be or attained, as will morefully hereinafter appear.

' The principal object of my invention is to so construct the 'door andattached mechanisms as to provide a simple, economical and efficientdoor action which will be semiautomatic in opening and comparatively,easy of closure against a head of ore or other material in the pocketwhen it is desired to stop the flow of same. This object I attain in themanner hereinafter set forth.

The invention consists principally in thenovel structural features andcombination and arrangement of parts, or mechanisms, 35 whereby the dooris held in place audits movements controlled, as hereinafterillustrated, described and claimed.

In illustrating and describing these improvements I have onlyillustrated and will describe that which I consider to be new, taken inconnection with so much as is old as will properly -disclose theinvention to others and enable those skilled in the art to practice thesame, leaving, out of consideration other and well known elements, whichif set forth herein would-only tend to confusion, prolixity andambiguity.

In the art to which this invention relates it is well known that withthe present size of doors used, the ore when damp or sticky frequentlyarches clear across the door opening, causing much difficulty, andinvolving considerable time,, labor and ex ense to break the archedmaterialgenera ly from inginaterial can be discharged;

and links a uniformly downward movement about the fixed pivot from thethrust of the material in the bin, thus holding the outer ends of thestruts and links against the cams or dogs or causing them to drop withcertainty to the stops 17 when the cams 13 are disengaged by theoperator.

A short distance above the' level of the door pivots when the door is inthe closed position, and just outside the path of the outer ends of thelinks-12 extends a cam shaft 14- parallel to the door 7 and revolublyattached to the side plates 6 by means of the brackets 15hr in any othersuitable manner, said cam shaft having keyed or pinned thereto, acontrolling handle 16 and two cams or dogs 13 adapted to be projected.into the path of said links 12 at some little distance above the levelof the door pivots of struts 11 when door is in the closed position; insuch a manner as to serve as a stop for the outer ends of said. strutsand links 11 and 12 holding the same at such a height that the door 7can be forced down through a How of ore in the discharge opening to theclosed position, the link motion comprising parts 11 and 12 holding thedoor against the thrust of the ore while the cams remain in lace. p

Y on it is desired to' open the door, the cams 13 are withdrawn from thepath or the links 12 by means of the shaft l land handle 16 thereon;when the outer ends of the links 12 revolve downwardly about'theirpivots,

from the thrust of the door throu h thestruts 11 until the said links12'str e the steps 17 which project hem and are attached to thesideyplates 6 at such a point below and in the path of the links 12 thatwhen said links 12 are. resting on said stops 17 the outer ends of thestruts 11, which are pivoted to the outer ends of links'12, will be somuch lower than the door'pivots of struts 11' that said struts 11 willbe .at such an angle with the door that the pressure of the iscounterbalanced in a suitable manner, 'as

the door may weigh several hundred pounds when of large size andsubstantially. built, as is herein contemplated.

In Fig. 1, the door is shown closed. In Fig. 3, the door is shown raisedor wide open, leaving the chute free fordischarge of ore or othermateriaL, In Fig. 4:, the

door is shown lowered to the position where it begins to cut ofl? theflow of ore. The dogs 13 are set to stop the links'12' 'in the upperposition, so that as the door goes down into the ore the struts 11 turnon the pivots which attach them to the ends of the links.

The door is pushed down by hand, the struts taking the thrust of the oreagainst the door almost entirely, and after the door gets below acertain position,the resultant of the thrust of the ore and the thrustof the struts "11 forces the door further downward and holds it down solong as the outer pivots oi. the struts and links are held in the upperposition by means of the dogs 13.

In actual construction there will be con- 1 ditions at times when thestops 17 would probably be unnecessary, such as; should the ink motionbe attached nearer to the bottom of the door, the bottom of the chutemight serve as a stop; also when link 12 is considerably shorter thanstruts 11 the stop might not be necessary, but would however, bedesirable to render the action steadier and more reliable; and it isunderstood that other changes in the details or proportions as may bedesired by one skilled in the art,

can be made without departing from the in-- 5 in turn are pivoted to theore discharge,

means for controlling the positions of the outer centers of said linkmotions by which the outer center may be heldvat a desired height tohold the door against the thrust of the ore when closing same, means forlowering the-outer center when desired, in order that the thrust of theore may be utilized in combination with the link mdtion, to raise thedoor above the flow of ore, substantially as described.

2, The combination with anore receptacle and'chute having a dischargeopening,'tl1e chute bein provided with vertical guideways, of'a oorhavin its top provided with V pivots adapted-to'sli cm the guideways, a

pair "of struts pivoted to the lower lateral edges of the door andextending outward, a pa r ,oflmks-pivoted to the sides of the,

chute, th'eouter ends of the links and struts being alsopivoted-together, and means for locking the outer 'ends'ofthe linksagainst the thrust of the struts and the door, and

means for releasing the same, as described. g. 3. The combination with achute havin a' discharge openin and vertical guides o a gate adapted toc ose said opening and pro vided with pivots adapted to slide in theguides, a air of struts pivoted to the door: and exten ing outwardlytherefrom, a pair 501: links which are shorter than the struts a pair ofcams adapted for engagementwithand pivoted to the sides of the chute,their outer ends being also pivoted to the struts,

- serve as stops when engaged with the links,

. of the oper'ator',as escribed.

1 14. The combination with an ore vthus locking the same against thethrust of the door or releasin the latter at the will bin having adischarge opening, of a door having a counterbalance and adapted toslide vertically and a link mechanism pivotall connected with the doorand the latter a apted to move outwardly and upwardly when unlocked,means for keeping the outer center i of the link mechanism in theuppermost position. when it is desired to close the door and to lock thedoor in place when closed,

and means for locking and unlocking the link mechanism, as described.

5. The combination with a storage bin for ore, or other granularmaterial, rovided with vertical .guideways and a discharge opening, of adoor.ad'apted to close said lateral to slide in said guideways andhaving t e respective lower lateral edges pivoted to a pair of strutsextending outwardly therefrom, means for fixing the osition of the outerends of said struts during the closing of the door, and as long as it isdesired to keep door closed, links pivoted to the sides of the chute andtheir outer ends pivoted to said struts; means for lowering the positionof the outer pivots of said struts and links to release doorsubstantially as described.

6. The combination with a storage bin for ore, or other granularmaterial, rovided with vertical guidewa s and a discharge opening, of adoor a apted to close said opening, said door having the to lateraledges provided with ivots adapte to slide 1n said guideways an havingthe respective lower lateral edges thereof 1voted to a pair of strutsextendmg outwar ytherefrom and having their outer ends pivoted to linkswhich are in turn pivoted to the front of the bin, means for holding theouter ends of the links against the thrust of the door, means forreleasing same when desired together with means for stopping same atproper position when closing door.

7. A device of the class prising, in combination, a bin having anopening in one wall thereof, a closure for said opening adapted forcompound movement in'a vertical and horizontal direction, a strut onsaid closure and means associated with said strut adapted to control thepath of. travel of the free end thereof, substantially as described.

ROBERT B. PEARSON.

described, com- Gopiesot this patent may be obtained for five centseach, byuaddressing the "Commissioner of Patents,

Washington, D. G.

